CAJ | 학술논문

本文基于中国大陆西部流动重力测量获得的区域重力场变化数据，尝试对其进行多种位场变换，在一定空间尺度约束下定义了6种区域重力场变化指标量．在此基础上，以中国大陆2002年、2005年和2008年等3期数据为研究对象，计算并统计了中国大陆西部 MS ≥6．0地震震中位置处震前重力场变化及各种导出参数值，尝试初步构建以地震预报为目的的地震重力学科指标体系参数．研究结果表明，震前区域重力场变化与地震发生位置没有显著的统计关系，但是重力场变化的垂直梯度和解析信号模量具有一定的地震预报意义，适合作为地震前兆异常使用．
본문기우중국대륙서부류동중력측량획득적구역중력장변화수거，상시대기진행다충위장변환，재일정공간척도약속하정의료6충구역중력장변화지표량．재차기출상，이중국대륙2002년、2005년화2008년등3기수거위연구대상，계산병통계료중국대륙서부 MS ≥6．0지진진중위치처진전중력장변화급각충도출삼수치，상시초보구건이지진예보위목적적지진중역학과지표체계삼수．연구결과표명，진전구역중력장변화여지진발생위치몰유현저적통계관계，단시중력장변화적수직제도화해석신호모량구유일정적지진예보의의，괄합작위지진전조이상사용．
In this paper,based on the regional gravity field variation derived from the mobile gravity observed data in the western China,we have got the six sorts of gravity variations at each space-fixed cell by means of the potential field transform.On the basis of the six types of variations,taking the three-issue gravity data in the years 2002,2005,2008 as study objects,we computed and analyzed the relationships between the MS ≥6.0 earthquake and the gravity vari-ation with the derived parameters,so that we could try to establish the index system for the purpose of the earthquake forecast.Our study results show that there is no significant relationship between the gravity variation and epicentral location before earthquakes.However,the amplitude of analytic signal and vertical gradient of gravity variation are related to the location of earthquakes happened in future,which can be used for the prediction of the earthquake loca-tion as earthquake precursory anomalies.